1. The Use of LiDAR Data to Analyze Snowpack with ArcGIS
By: Sam Tyler

2. Outline Daniel Forest Objectives LiDAR flight data Classification
2008; March 28th, April 28th
2009; March 18th, March 27th, May 27th, July 08th
Classification
Process/ Method
Model Builder to automate
Results
Conclusion

3. Daniel Forest (TWDEF) Location: 30 miles Northeast of Logan, Utah
TWDEF area of .78km^2
Elevation: 8600ft
Watershed contributes to the Logan River and Bear Lake
Vegetation

4. Objectives Will TWDEF LiDAR data determine snow depth?
Compare LiDAR data to field measurements of Vinod Mahat
Compare LiDAR depth to SNOWTEL data.

5. LiDAR Data Classification

6. Snow Survey & SNOTEL Site Locations
21 snow survey points
Visited every two weeks:
Imagery Map

7. XYZ Data ArcGIS
March 27, 2009
July 8, 2009
XYZ Ground Classification

8. Tin
Tin 3D Analyst Tool
Point Cloud Density

9. Conversion to Raster
Tin to Raster 3D Analyst
Ease Calculations

10. Raster Difference
Minus Tool
March 27, 2009 minus July 8, 2009

11. Model Builder

12. Value Output to Snow Survey Points

13. GIS Data to Excel for Comparison
Vinod ground measurements
Comparison of Tin LiDAR to Raster LiDAR
Conversion from meters to inches

14. SNOTEL Data Analysis
SNOTEL data: 24 hours
96”
LiDAR
95”

15. Conclusion TWDEF LiDAR accuracy.
Accuracy requirements while using LiDAR data.
0-9 inches
Considerations while using TWDEF LiDAR :
Classification
Reflection
Time difference
LiDAR depth vs. SNOWTEL

16. Acknowledgements Vinod Mahat Dr. David Tarboton Tseganeh Zekiewos
Brad Carter
Questions?